These mats last a few years and it was time for a new one as the previous one just wore out and was cracking and coming apart. I bought the old one at Staples and went back when it was time for a new one.
It was economical but either my carpet is a higher pile than they recommend (I thought it was low pile) or I'm over the weight limit at 150 lbs. My chair has left many dents in the mat in just a first few weeks that keep me from moving swiftly on this mat...better than bare carpet but I wish I had purchased a more heavy duty one...and now it's too dented to return.
The real test of carpet mats is time. If they last a year under constant use they are high quality. I ve only used this one for a couple of weeks and it is doing fine so far.